Error in Matlab compiled executable when using Serial()

Hi all,

I created a Matlab executable (created with GUIDE) to communicate with an Arduino. Runs fine when started from Matlab environment. But when compiled and installed, it gives an error when using Serial():

"Error using serial (line 85) Cannot create: No class com.mathworks.toolbox.instrument.SerialComm can be located on the Java Class Path"

Does anybody know how to avoid this error?

Some additional comments:

• 'Run as an administrator' makes no difference
• Compiled and run with the same (latest) Matlab runtime.

Thanks in advance,

Guido Kooijman

Answer 1

[Harsheel]

It seems like the correct jar files have not been picked up during the compilation process leading to a java runtime error. To resolve this

- Create a javaclasspath.txt file in your preference directory.

Location of prefdir:

>> prefdir  %if on windows, just execute >>winopen(prefdir)

- Add the following 2 entries in javaclasspath.txt:

$matlabroot/java/jar/toolbox/testmeas.jar
$matlabroot/java/jar/toolbox/instrument.jar

where $matlabroot should be substituted with your matlab root directory. You can find this by typing:

>> matlabroot

- Restart MATLAB (if open) and recompile your application.

Answer 2

[Alexander Foster]

I have run into the same issue. I had a program which would compile and run in R2013b but when I upgraded to R2015a and recompiled it I would see, "No class com.mathworks.toolbox.instrument.SerialComm can be located on the Java Class Path".

I fixed the problem by adding the following option to my call to mcc:

-a [matlabroot]\java\jar\toolbox

where [matlabroot] is the path returned when you run the command "matlabroot".

If you use the gui to compile I believe that you can get the same effect using the "File required for your application to run" section.